2003 Almanac (page 258) Table 5-37 2002 Emission Inventory by Compound San Francisco Bay Area Air Basin - Chromium (Hexavalent) Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 0.11 29% <0.1% Area-wide Sources 0 0 0 On-Road Mobile 0.02 6% 1% Gasoline Vehicles 0.02 6% 1% Diesel Vehicles < .01 0% 0% Other Mobile 0.25 65% 10% Natural Sources < .01 0% <0.1% Total 0.39 100% 15% Total Statewide 2.56